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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      function Person(name, age) {
        this.name = name;
        this.age = age;
      }
      // 构造函数的原型对象的属性和方法可以被构造函数的实例所访问
      Person.prototype.gender = "男";
      let p = new Person("张三", 18);
      console.log(p.name);
      console.log(p.age);
      console.log(p.gender);
    </script>
  </body>
</html>
